The Magpul Tactile Lock-Plate Type 2 in black polymer is a smart and practical magazine enhancement designed for quick and efficient identification of mixed loadouts. Featuring double 1/8-inch raised ridges this lock-plate allows users to distinguish between different ammunition types such as ball tracer supersonic and subsonic simply by touch even while wearing gloves. Its pronounced tactile design ensures reliability and ease of use in any situation. Fully compatible with standard PMAG 10/20/30 AR/M4 Gen M3 and PMAG AR 300 B Gen M3 floor plates this lock-plate maintains full functionality whether the magazine is inserted into a weapon or stored in a pouch. Crafted from durable black polymer it is a lightweight and efficient solution for streamlined loadout management. Note that it is not compatible with PMAG 40 AR/M4 Gen M3 magazines.